68 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
sinuatis; intense violacea, pellucida; columella breviuscula, parum reflexa; 
apertura parva, medio emarginata. 
Shell conically turbinated, spire raised, with the sutures impressed, 
sharp at the apex; whorls rounded, concentrically lamellately wrinkled, 
wrinkles sinuated in the middle; deep-violet, transparent; columella rather 
short, but reflected; aperture small, notched in the middle. (Conchologica 
Iconica .) 
Type locality, Cornwall. 
Range. Catalina Island, California, to West Mexico. Fossil: Pelagic. 
Janthina ceruleata Reeve, 1858 
Conchologica Iconica , Janthina; fig. 7. 
Ianth. testa depresso-turbinata, spira parva, anfractibus declivi- 
convexis, oblique subrude plicato-striatis, spiraliter dense minute malleato- 
striatis; intense caeruleo-violacea, versus apicem albicante, fascia lata 
pallida circa columellam; columella subrecta, appresso-reflexa; apertura 
transversa, medio sinuata. 
Shell depressly turbinated, spire small, whorls slopingly convex, 
obliquely rather rudely plicately striated, spirally densely minutely in- 
dentedly striated; deep blue-violet, whitish toward the apex, with a broad 
pale band round the columella; columella nearly straight, appressly re¬ 
flected; aperture transverse, sinuated in the middle. (Reeve.) 
Type in Museum Cuming. Type locality, San Diego, California? 
Range. Known only from type locality. 
Family MELANELLIDAE 
Genus MELANELLA Bowdich, 1822 1 
The genus as here constituted embraces the white polished mollusks 
that have the last whorl produced and the inner lip appressed for its 
entire length, or at least for the greater part of its length, to the atten¬ 
uated base. The shells may be straight or flexed. (Bartsch.) 
Type. Melanella dufresnii Bowdich. 
Distribution. Europe and on the Pacific coast of North America, 
Aleutian Islands, Alaska, to Gulf of California; also Cerros Islands and 
Galapagos Islands. Fossil: Upper and Lower San Pedro Series, Santa 
Monica to Point Abreojos, Lower California. 
1 For description of new species received while this volume was in press, see 
Appendix, p. 280. 
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